For uniqueness enforcements, there are two modes:
unique=get_or_create: Create a new node/relationship and index it if no existing one can be found. If an existing node/relationship is found, discard the sent data and return the existing node/relationship.
unique=create_or_fail: Create a new node/relationship if no existing one can be found in the index. If an existing node/relationship is found, return a conflict error.
For more information, see Section 17.6, “Creating unique nodes”.
The node is created if it doesn’t exist in the unique index already.
Example request
POST http://localhost:7474/db/data/index/node/people?uniqueness=get_or_create
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Tobias",
"properties" : {
"name" : "Tobias",
"sequence" : 1
}
}Example response
201: Created
Content-Type: application/json
Location: http://localhost:7474/db/data/index/node/people/name/Tobias/18
{
"extensions" : {
},
"paged_traverse" : "http://localhost:7474/db/data/node/18/paged/traverse/{returnType}{?pageSize,leaseTime}",
"outgoing_relationships" : "http://localhost:7474/db/data/node/18/relationships/out",
"traverse" : "http://localhost:7474/db/data/node/18/traverse/{returnType}",
"all_typed_relationships" : "http://localhost:7474/db/data/node/18/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/18/properties/{key}",
"all_relationships" : "http://localhost:7474/db/data/node/18/relationships/all",
"self" : "http://localhost:7474/db/data/node/18",
"outgoing_typed_relationships" : "http://localhost:7474/db/data/node/18/relationships/out/{-list|&|types}",
"properties" : "http://localhost:7474/db/data/node/18/properties",
"incoming_relationships" : "http://localhost:7474/db/data/node/18/relationships/in",
"incoming_typed_relationships" : "http://localhost:7474/db/data/node/18/relationships/in/{-list|&|types}",
"create_relationship" : "http://localhost:7474/db/data/node/18/relationships",
"data" : {
"sequence" : 1,
"name" : "Tobias"
},
"indexed" : "http://localhost:7474/db/data/index/node/people/name/Tobias/18"
}Here, a node is not created but the existing unique node returned, since another node is indexed with the same data already. The node data returned is then that of the already existing node.
Example request
POST http://localhost:7474/db/data/index/node/people?uniqueness=get_or_create
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Peter",
"properties" : {
"name" : "Peter",
"sequence" : 2
}
}Example response
200: OK
Content-Type: application/json
Location: http://localhost:7474/db/data/index/node/people/name/Peter/12
{
"extensions" : {
},
"paged_traverse" : "http://localhost:7474/db/data/node/12/paged/traverse/{returnType}{?pageSize,leaseTime}",
"outgoing_relationships" : "http://localhost:7474/db/data/node/12/relationships/out",
"traverse" : "http://localhost:7474/db/data/node/12/traverse/{returnType}",
"all_typed_relationships" : "http://localhost:7474/db/data/node/12/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/12/properties/{key}",
"all_relationships" : "http://localhost:7474/db/data/node/12/relationships/all",
"self" : "http://localhost:7474/db/data/node/12",
"outgoing_typed_relationships" : "http://localhost:7474/db/data/node/12/relationships/out/{-list|&|types}",
"properties" : "http://localhost:7474/db/data/node/12/properties",
"incoming_relationships" : "http://localhost:7474/db/data/node/12/relationships/in",
"incoming_typed_relationships" : "http://localhost:7474/db/data/node/12/relationships/in/{-list|&|types}",
"create_relationship" : "http://localhost:7474/db/data/node/12/relationships",
"data" : {
"sequence" : 1,
"name" : "Peter"
},
"indexed" : "http://localhost:7474/db/data/index/node/people/name/Peter/12"
}Here, in case of an already existing node, an error should be returned. In this example, no existing indexed node is found and a new node is created.
Example request
POST http://localhost:7474/db/data/index/node/people?uniqueness=create_or_fail
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Tobias",
"properties" : {
"name" : "Tobias",
"sequence" : 1
}
}Example response
201: Created
Content-Type: application/json
Location: http://localhost:7474/db/data/index/node/people/name/Tobias/17
{
"extensions" : {
},
"paged_traverse" : "http://localhost:7474/db/data/node/17/paged/traverse/{returnType}{?pageSize,leaseTime}",
"outgoing_relationships" : "http://localhost:7474/db/data/node/17/relationships/out",
"traverse" : "http://localhost:7474/db/data/node/17/traverse/{returnType}",
"all_typed_relationships" : "http://localhost:7474/db/data/node/17/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/17/properties/{key}",
"all_relationships" : "http://localhost:7474/db/data/node/17/relationships/all",
"self" : "http://localhost:7474/db/data/node/17",
"outgoing_typed_relationships" : "http://localhost:7474/db/data/node/17/relationships/out/{-list|&|types}",
"properties" : "http://localhost:7474/db/data/node/17/properties",
"incoming_relationships" : "http://localhost:7474/db/data/node/17/relationships/in",
"incoming_typed_relationships" : "http://localhost:7474/db/data/node/17/relationships/in/{-list|&|types}",
"create_relationship" : "http://localhost:7474/db/data/node/17/relationships",
"data" : {
"sequence" : 1,
"name" : "Tobias"
},
"indexed" : "http://localhost:7474/db/data/index/node/people/name/Tobias/17"
}Here, in case of an already existing node, an error should be returned. In this example, an existing node indexed with the same data is found and an error is returned.
Example request
POST http://localhost:7474/db/data/index/node/people?uniqueness=create_or_fail
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Peter",
"properties" : {
"name" : "Peter",
"sequence" : 2
}
}Example response
409: Conflict
Content-Type: application/json
{
"extensions" : {
},
"paged_traverse" : "http://localhost:7474/db/data/node/6/paged/traverse/{returnType}{?pageSize,leaseTime}",
"outgoing_relationships" : "http://localhost:7474/db/data/node/6/relationships/out",
"traverse" : "http://localhost:7474/db/data/node/6/traverse/{returnType}",
"all_typed_relationships" : "http://localhost:7474/db/data/node/6/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/6/properties/{key}",
"all_relationships" : "http://localhost:7474/db/data/node/6/relationships/all",
"self" : "http://localhost:7474/db/data/node/6",
"outgoing_typed_relationships" : "http://localhost:7474/db/data/node/6/relationships/out/{-list|&|types}",
"properties" : "http://localhost:7474/db/data/node/6/properties",
"incoming_relationships" : "http://localhost:7474/db/data/node/6/relationships/in",
"incoming_typed_relationships" : "http://localhost:7474/db/data/node/6/relationships/in/{-list|&|types}",
"create_relationship" : "http://localhost:7474/db/data/node/6/relationships",
"data" : {
"sequence" : 1,
"name" : "Peter"
},
"indexed" : "http://localhost:7474/db/data/index/node/people/name/Peter/6"
}Create a unique relationship in an index.
Example request
POST http://localhost:7474/db/data/index/relationship/knowledge/?uniqueness=get_or_create
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Tobias",
"start" : "http://localhost:7474/db/data/node/425",
"end" : "http://localhost:7474/db/data/node/426",
"type" : "knowledge"
}Example response
201: Created
Content-Type: application/json
Location: http://localhost:7474/db/data/index/relationship/knowledge/name/Tobias/239
{
"extensions" : {
},
"start" : "http://localhost:7474/db/data/node/425",
"property" : "http://localhost:7474/db/data/relationship/239/properties/{key}",
"self" : "http://localhost:7474/db/data/relationship/239",
"properties" : "http://localhost:7474/db/data/relationship/239/properties",
"type" : "knowledge",
"end" : "http://localhost:7474/db/data/node/426",
"data" : {
"name" : "Tobias"
},
"indexed" : "http://localhost:7474/db/data/index/relationship/knowledge/name/Tobias/239"
}Here, in case of an already existing relationship, the sent data is ignored and the existing relationship returned.
Example request
POST http://localhost:7474/db/data/index/relationship/rels?uniqueness=get_or_create
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Peter",
"start" : "http://localhost:7474/db/data/node/429",
"end" : "http://localhost:7474/db/data/node/430",
"type" : "KNOWS"
}Example response
200: OK
Content-Type: application/json
{
"extensions" : {
},
"start" : "http://localhost:7474/db/data/node/427",
"property" : "http://localhost:7474/db/data/relationship/240/properties/{key}",
"self" : "http://localhost:7474/db/data/relationship/240",
"properties" : "http://localhost:7474/db/data/relationship/240/properties",
"type" : "KNOWS",
"end" : "http://localhost:7474/db/data/node/428",
"data" : {
},
"indexed" : "http://localhost:7474/db/data/index/relationship/rels/name/Peter/240"
}Here, in case of an already existing relationship, an error should be returned. In this example, no existing relationship is found and a new relationship is created.
Example request
POST http://localhost:7474/db/data/index/relationship/rels?uniqueness=create_or_fail
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Tobias",
"start" : "http://localhost:7474/db/data/node/437",
"end" : "http://localhost:7474/db/data/node/438",
"type" : "KNOWS"
}Example response
201: Created
Content-Type: application/json
Location: http://localhost:7474/db/data/index/relationship/rels/name/Tobias/243
{
"extensions" : {
},
"start" : "http://localhost:7474/db/data/node/437",
"property" : "http://localhost:7474/db/data/relationship/243/properties/{key}",
"self" : "http://localhost:7474/db/data/relationship/243",
"properties" : "http://localhost:7474/db/data/relationship/243/properties",
"type" : "KNOWS",
"end" : "http://localhost:7474/db/data/node/438",
"data" : {
"name" : "Tobias"
},
"indexed" : "http://localhost:7474/db/data/index/relationship/rels/name/Tobias/243"
}Here, in case of an already existing relationship, an error should be returned. In this example, an existing relationship is found and an error is returned.
Example request
POST http://localhost:7474/db/data/index/relationship/rels?uniqueness=create_or_fail
Accept: application/json
Content-Type: application/json
{
"key" : "name",
"value" : "Peter",
"start" : "http://localhost:7474/db/data/node/419",
"end" : "http://localhost:7474/db/data/node/420",
"type" : "KNOWS"
}Example response
409: Conflict
Content-Type: application/json
{
"extensions" : {
},
"start" : "http://localhost:7474/db/data/node/417",
"property" : "http://localhost:7474/db/data/relationship/236/properties/{key}",
"self" : "http://localhost:7474/db/data/relationship/236",
"properties" : "http://localhost:7474/db/data/relationship/236/properties",
"type" : "KNOWS",
"end" : "http://localhost:7474/db/data/node/418",
"data" : {
},
"indexed" : "http://localhost:7474/db/data/index/relationship/rels/name/Peter/236"
}Copyright © 2013 Neo Technology